Lock-nut



R. L. CHANCE.

LOCK NUT.

APPLICATION FILED MAR) 31, 1919:

Patented Ma 10,1921.

fnve ntov @wyf (UNITED) STATES eA EN OFFICE? ROY L; CHANCE, or SAN raaivorsoo, CALIFORNIA.

Loo Ur.

- To all whomit may concern: i

Be it known that I, ROY L. CHANGE, a citizen'of the Unitedstates, residing in the city andgcounty of San Francisco and State of California, have invented a new and useful improvement in Lock-Nuts, of which the following is a specification.

I My invention relates to improvements in lock nuts, wherein an annular ratchet operates in conjunction with pawl mounted wlthin a washer; and the ob ects-of my 1nvent-ion arefirst,lto provide an improved lock nut; second to provide: an improved lock nut which may be readily and'easily released after having been looked upon a bolt or the like; and third, to provide an improved lock for nuts which maybe ac v cessible for releasing purposes.

' I attain'these objects by means of the,

mechanism illustrated in the accompanying drawings in which r 1 i 7 Figure l is a partly broken sectional view showing my improvedlock nut in elevation; Fig. 2 is a bottom plan View of the washer;

Fig. 3 is a bottom plan viewof the nut;

Fig. 4 is a top plan'view of'the locking washer; Fig. 5 is any enlarged broken ele vation of the locking means; andFig. 6 an enlarged plan view of agportion of the washer.

Similar. numerals refer to similar parts throughout the several views. 7

The nut 1 is screwed uponth'e threaded portion 2 of a bolt 3 and has an annular flange 1 provided on its under surface with a an annular ratchet 5. A washer 6 is provided with a recess 7, which in one form'of the inventlon, opens out onto the side of said washer 6 asdisclosed- 1n Flgs. 4, 5 and 6 of the drawin s. Or the recesses 7 ma be 30- sitioned within the periphery of the washer 6 as disclosed in Fig. 1 ofthe drawings.

Within the recess 7 I have pivot-ally mounteda pawl 8 upon a pin 9 and asiiit able spring 10 is provlded within said recess 7 to normallyretain the pawl Sin engaging relation with the annular ratchet 5 and thereby permit a movement of thenut l relatively to the washer 6 in one directiononly. a

The washerG isprovided with a pin 11 "adapted to engage an aperture 12 within a -waded Poni s f e Pe t a ia he Specification of Letters Patent. Patented May 10, 1921. I Application filed March 31, 1919. Serial No. 286,547. 7

washer 6 has been positioned upon said nut to engagethe pin 11 with the aperture 12 in the member 13. The nut 1 is then screwed upon the bolt 3 until theratchet 5 approaches the pawl 8.

As the nutfl is further screwed upon the bolt the pawl 8 slides over the annular y 651 ratchet 5 thereby permitting movement in that direction and as the spring 10 nor-, 7

r mally holds said pawl 8 in engaging relation 7 with said ratchet 5v1t is evident that the nut 1 cannot. be turned in a reverse direction,

lVhen the'form of the invention, comprising the open recess,"is usechit is possible to insert an instrument to depress the spring 10 and thereby release the tension of same from the pawl 8. If the nut l'is then slightly turned in a clockwise direction a sufiicient amount the pawl 8 will be released 7 vltrom the ratchet 5 byitsl own weight and drop into the; recess 7 The nut 1 can then thereon having an annular ratchet "formed 7 i on the lower-surface thereof; a washer arranged on thebolt and below the nut and having an L-shaped recess therein, said recess opening from the side of said washer,

said washer being adapted to engage an apertnred member i held by the bolt; and a pawl pivotally mounted within the recess and arranged to engage the ratchet on the nut'to permit a movement of the said washer relatively to the nut. in one direction only.

2. In a lock nut, the combination with'the threaded end ot' a bolt of a nut screwed thereon and having an annular ratchet fog-med on the lower surface thereof; a washer arranged onthe bolt and below the v nut and having an L-shaped recess therein,

said recess-opening from the side of said.

washer, said washer being adapted to engage-an apertnred member held by the bolt;

a pawl pivotallymountedwithin the recess and arranged to engage the ratchet on the nut to permit'movement offthe said washer relatively to the nut, in one direction only;

i and means for normally retaining an engaging relation between the pawl and the v ratchet 7. v

In witness whereof I hereunto set mysignature. 

